the onion image was deleted long ago. changed it
to steak to be safe
removed the show links, but left the code in case
it needs to be reimplemented

add a break space at the bottom
made create and update filling redirect the user 
to the main index page because the show link was
removed
adjusted the spacing of the columns to match the
fillings page

added image to the table column

made the edit and destroy buttons look like the
blue buttons fillings has
removed image from spec data
set everything to text center to make it visually
similar to admin#fillings